hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 25500 at fs/hfsplus/bnode.c:573 hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Modules linked in:
CPU: 0 UID: 0 PID: 25500 Comm: syz.4.1981 Not tainted 6.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Code: 44 89 e6 e8 1c 46 2f 09 e9 78 fd ff ff e8 b2 b8 14 ff 4c 89 ff e8 6a 5f 3c 09 48 c7 c7 80 da 01 8c 44 89 e6 e8 fb 45 2f 09 90 <0f> 0b 90 eb af 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 83 fc ff ff 48
RSP: 0018:ffffc9000349efd8 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888054a54100 RCX: 03ceaf1da1c88d00
RDX: ffffc90008dc9000 RSI: 0000000000010e30 RDI: 0000000000010e31
RBP: 0000000000000000 R08: ffffffff8174016c R09: 1ffff92000693d9c
R10: dffffc0000000000 R11: fffff52000693d9d R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805dbd4000 R15: ffff88805dbd40e0
FS:  00007f25407516c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f429b2b7000 CR3: 0000000057c90000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x59a/0x640 fs/hfsplus/btree.c:415
 hfs_btree_inc_height+0x11e/0xdc0 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x166/0xde0 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x36b/0x5c0 fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent+0x84/0xe10 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x48c/0x1b70 fs/hfsplus/extents.c:462
 hfsplus_get_block+0x406/0x14f0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x50c/0x1a70 fs/buffer.c:2125
 __block_write_begin fs/buffer.c:2174 [inline]
 block_write_begin+0x9b/0x1e0 fs/buffer.c:2235
 cont_write_begin+0x645/0x890 fs/buffer.c:2587
 hfsplus_write_begin+0x8a/0xd0 fs/hfsplus/inode.c:47
 generic_perform_write+0x399/0x840 mm/filemap.c:4019
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4147
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f253f97cef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2540751038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f253fb35f80 RCX: 00007f253f97cef9
RDX: 000000000000fea0 RSI: 0000000020000040 RDI: 0000000000000009
RBP: 00007f253f9ef046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f253fb35f80 R15: 00007ffff6e423e8
 </TASK>